Abstract: A flexible window assembly for covering a window in a flexible wall such as is commonly found on recreational vehicles such as tent campers. The assembly includes a flexible transparent window pane that covers the screened opening in the flexible sidewall. The window pane is attached to the sidewall by a zipper and by rolling the window pane into a cylindrical shape the window pane is opened. A pair of flexible retaining straps extend between the top edge and the bottom edge of the wall which maintain the window pane in the cylindrical position. Each retaining strap includes a pair of cords, and a flexible decorative curtain is positioned in between the cords. A toggle member frictionally engages the cords and contacts the lower edge of the curtain, and accordingly the curtain can be positioned on a closed position, a raised position, or in a plurality of intermediate positions between the closed position and the raised position.

Abstract: The present invention provides methods and processes for immobilizing and solidifying harmful heavy metal and radioactive species within a waste material. The processes of the present invention are also particularly advantageous for immobilizing and solidifying nitrate compounds with a waste material. One embodiment of the present invention is a method that can be carried out by admixing the waste material with cement and a complexant compound to form a grout admixture. Preferably, the complexant compound is an iron compound that can form a hydrated iron oxide in the presence of an aqueous solution. This grout admixture is then allowed to cure and solidify. The grout admixture is placed within a suitable containment vessel for final storage and disposal.